A former teacher was arrested this week in Mountain View on suspicion of sending sexually explicit material to a person he believed was a minor and then arranging to have sex with him, police said.

The Mountain View Police Department and the Santa Clara County Specialized Enforcement Team arrested Harlan Edelman, 52, of San Francisco, on Tuesday.

The case kicked off when a detective posing as a 17-year-old boy on a social network was contacted unsolicited by Edelman, said Sgt. Saul Jaeger of the Mountain View Police Department.

Jaeger declined to identify the social network.

Edelman sent sexually explicit material to the detective and arranged to meet him in Mountain View to have sex, Jaeger said.

Edelman worked for the San Francisco Unified School District from 1995 to 2013, most recently at the Academy of Arts and Sciences, according to district officials. He resigned last year.

Jaeger said police have not linked Edelman to any other crimes but are hoping news of his arrest encourages victims to step forward. They are asked to call the police department at 650-903-6344 and refer to case no. 14-0649.

"As with any crime, it's usually never their first time," Jaeger said. "Especially since this guy is targeting juveniles, if he's truly a predator then there's probably going to be other victims."